Audiobahn stuff is ok not great. A lot of people into car audio don't like them cause they put more effort in to looks than the actaual internals of the amp. As for Performance Teknique 779 Ive never herd of the brand but did a search and suspect its probably not putting out its rated power for that amount of money. Most quality amps will cost you about about 75 cents per watt to give you an idea and will boast rms watts, not peak like that one. What is your budget and are you aming for loud or good sounding?